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प्रश्न
Give reason for the following:
Potassium is not extracted by electrolysis of its aqueous salt solution.
उत्तर
Electrolysis removes reactive metals from aqueous salt solutions. This is because the aqueous solution will contain both H+ and metal ions. When an electric current flows, the H+ ion is discharged first, followed by the metal. Thus, the cathode produces hydrogen gas rather than metal, and potassium does not accumulate at the cathode.
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संबंधित प्रश्न
What is the difference between:
Electrolytic dissociation and ionisation.
State the electrode reaction at the anode during electrolysis of:
sodium chloride solution.
Give reason for the following:
Ammonia is unionised in the gaseous state but in the aqueous solution, it is a weak electrolyte.
To carry out the so-called “electrolysis of water”. Sulphuric acid is added to water. How does the addition of sulpuric acid produce a conducting solution?
Explain, why electrolysis is an example of redox reaction?
Fill in the black.
The metal plate through which ____________ leaves from an electrolyte is called ____________ .It has ______________ of electrons.
Fill in the blank :
Hydrogen and metallic ions are ____________ because they ____________ electrons.
Name : A non-metallic element which is a conductor of electricity.
Choose A, B, C or D to match the descriptions (i) to (v) below . Some alphabets may be repeated.
(A) Non-electrolyte, (B) Strong electrolyte, (C) Weak electrolyte, (D) Metallic conductor
(i) Molten ionic compound
(ii) Carbon tetrachloride
(iii) An aluminium wire
(iv) A solution containing solvent molecules, solute molecules and ions formed by the dissociation of solute molecules
(v) A sugar solution with sugar molecules and water molecules.
State your observation of the following case:
At the cathode when acidified aqueous copper sulphate solution is electrolyzed with copper electrodes.
